CN215865460U - Electronic scale with calibration function - Google Patents
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- CN215865460U CN215865460U CN202121974433.9U CN202121974433U CN215865460U CN 215865460 U CN215865460 U CN 215865460U CN 202121974433 U CN202121974433 U CN 202121974433U CN 215865460 U CN215865460 U CN 215865460U
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Abstract
The utility model discloses an electronic scale with a calibration function, which can achieve the aim of preventing cheating and can monitor the metering performance of the electronic scale through a calibration module. Including calibration module, communication module and display module, wherein: the calibration module comprises a weight component and a detection module which is used for being matched with the weight component to detect weight information of the weight; the detection module is in signal connection with the communication module, and the display module is in signal connection with the communication module; the communication module is used for sending the detection information obtained by the detection module to the control equipment and sending the result information fed back by the control equipment to the display module so that the display module displays the result information.
Description
Technical Field
The utility model relates to the technical field of metering, in particular to an electronic scale with a calibration function.
Background
In the existing electronic scales, each electronic scale is provided with an independent Central Processing Unit (CPU), and the CPU is connected with a sensor of the electronic scale. The user can calibrate the electronic scale directly through the control key of the electronic scale and modify the corresponding curve of the A/D signal and the display value so as to achieve the aim of cheating.
In addition, the weighing accuracy of the electronic scale is not guaranteed along with the aging of the sensor, when a weighing object with the same weight is loaded, the variation of voltage or current caused by the deformation of the sensor is changed along with the aging of the sensor, and the deviation between the display value corresponding to the generated A/D signal and the actual weighing value is easily caused.
Disclosure of Invention
The utility model provides an electronic scale with a calibration function, which can achieve the aim of preventing cheating and can monitor the metering performance of the electronic scale through a calibration module.
The embodiment of the utility model provides an electronic scale with a calibration function, which comprises a calibration module, a communication module and a display module, wherein:
the calibration module comprises a weight component and a detection module which is used for being matched with the weight component to detect weight information of the weight;
the detection module is in signal connection with the communication module, and the display module is in signal connection with the communication module;
the communication module is used for sending the detection information obtained by the detection module to the control equipment and sending the result information fed back by the control equipment to the display module so that the display module displays the result information.
As an optional implementation manner, the detection module includes a sensor and an information processing module, wherein:
the sensor is in signal connection with the information processing module;
the sensor is used for detecting weight information of at least part of weights moving to the force bearing surface of the sensor in the weight component and sending the weight information to the communication module through the information processing module.
In an alternative embodiment, the sensor is a load cell.
As an alternative embodiment, the detection module further comprises a pivot shaft connected to the weight assembly, wherein:
the rotating shaft drives at least part of weights in the weight component to move from an initial position to the force bearing surface of the sensor through rotation in a first direction so as to load the weights; or
The rotating shaft drives the weight component to move from the force bearing surface of the sensor to the initial position through rotation in a second direction so as to unload the weight, wherein the first direction and the second direction are opposite directions.
As an alternative embodiment, the rotating shaft is in signal connection with the communication module, and the communication module is used for indicating the rotating direction of the rotating shaft.
As an optional implementation, the information processing module includes an amplifier, an analog/digital a/D converter, wherein:
the sensor is connected with the communication module through the amplifier and the A/D converter in sequence.
As an optional implementation, the detection module is in signal connection with the communication module, and includes:
the detection module is in signal connection with the communication module through at least one of wireless communication technology WI-FI, Bluetooth and a wired network with a fixed IP address.
As an optional implementation manner, the communication module and the display module are in signal connection through at least one of WI-FI, bluetooth and a wired network with a fixed IP address.
As an optional implementation manner, the electronic scale further comprises an alarm module, and the alarm module is in signal connection with the communication module through at least one of WI-FI, bluetooth and a wired network with a fixed IP address.
The utility model provides an electronic scale with a calibration function, which is used for transplanting a processor of the electronic scale into control equipment such as a PC (personal computer) to achieve the aim of preventing cheating, automatically calibrating the electronic scale through a calibration module so as to send a calibrated corresponding curve of an A/D (analog/digital) signal value and a display value to the control equipment, determining the accuracy of the electronic scale by comparing the curve corresponding to the A/D signal value and the display value before calibration through the control equipment, and feeding back to the electronic scale to realize the monitoring of the metering performance of the electronic scale.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a current electronic scale according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electronic scale with calibration function according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an electronic scale and a detection module thereof according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a weight detecting assembly according to an embodiment of the present invention;
fig. 5 is a schematic view of a connection structure between a rotating shaft and a communication module according to an embodiment of the present invention;
FIG. 6 is a diagram of an information processing module of an electronic scale according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a system of a control device and an electronic scale according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
The existing electronic scale is generally composed of a weighing sensor, an amplifying and filtering circuit, an A/D converter, a Central Processing Unit (CPU) and a display, and is an integrated electronic scale. During weighing, a weighing object converts gravity into an analog signal (mostly a voltage signal) of voltage or current through a weighing sensor arranged on a mechanism, the analog signal is converted into a digital signal through an A/D converter after amplification and filtering, the digital signal is operated and processed by a Central Processing Unit (CPU), and finally the digital signal is displayed in a digital mode through a display screen (the A/D signal and an output display value form a fixed linear relation, and the linear relation between the A/D signal and the display value can be calibrated in a standard weight assignment mode). In order to facilitate use, the electronic scale can adopt a wired or wireless transmission mode to transmit a final result after the operation processing of a Central Processing Unit (CPU) to one or more displays according to use requirements.
As shown in fig. 1, in the current electronic scales, each electronic scale is provided with an independent processor (CPU) connected to a sensor part. The user can directly calibrate the electronic scale through a control key of the electronic scale, enters a calibration program through a calibration key or a combined key on a control panel of the electronic scale, loads a corresponding weight on the electronic scale according to the prompt of the calibration program, records an A/D signal value after the weight is loaded, and then generates a measurement curve by using the A/D signal value of the scale pan in an idle state to finish calibration. In the calibration process of the electronic scale, if the mass value of the loaded weight is inconsistent with the mass value prompted to be loaded by the electronic scale, errors can be artificially introduced, and the purpose of cheating is achieved. If the electronic scale displays that a weight of 20kg is loaded in the calibration process and actually loads a weight of 30kg, the electronic scale automatically takes the A/D signal generated when the weight of 30kg is loaded as the A/D signal generated when the weight of 20kg is loaded, and the A/D signal is used for generating a measurement curve and introducing errors. The corresponding curve of A/D signal and display value is modified, and before the examination is received, the correct corresponding curve is modified so as to attain the goal of cheating. Meanwhile, the weighing accuracy of the electronic scale cannot be guaranteed, along with the aging of the sensor, when a weighing object with the same weight is loaded, the deformation quantity of the sensor or the voltage or current variation quantity caused by the deformation quantity of the sensor possibly changes, so that the deviation between the curve corresponding to the original A/D signal and the display value and the actual weighing value is caused, but the deviation is not easily found in the use process, the performance can be confirmed only by a regular verification mode at present, and whether the metering performance of the electronic scale is accurate or not in two verification periods cannot be monitored.
The utility model provides an electronic scale with a calibration function, which has the core idea that a processor of the electronic scale is transplanted to a control device such as a PC (personal computer), namely the electronic scale does not contain the processor and does not have the function of generating a corresponding curve of an A/D signal value and a display value, and the PC replaces a Central Processing Unit (CPU) of the electronic scale and stores the corresponding curve of the A/D signal and the display value of the electronic scale at a PC end. Therefore, the aim of preventing cheating is achieved by avoiding manually modifying the corresponding curve of the A/D signal value and the display value, the electronic scale is automatically calibrated through the calibration module, the calibrated A/D signal value and the corresponding curve of the display value are sent to the control equipment, and then whether the accuracy of the electronic scale deviates or not is determined by the control equipment and is fed back to the electronic scale, so that the real-time monitoring of the metering performance of the electronic scale is realized.
As shown in fig. 2, the electronic scale with calibration function provided by the present invention includes a calibration module 200, a communication module 201 and a display module 202, wherein:
the calibration module comprises a weight component 200a and a detection module 200b for cooperating with the weight component to detect weight information of the weight; wherein the weight assembly 200a includes, but is not limited to, a plurality of weights or loads of different weights.
The detection module 200b is in signal connection with the communication module 201, and the display module 202 is in signal connection with the communication module 201; optionally, the detecting module 200b is in signal connection with the communication module 201 through at least one of wireless communication technology WI-FI, bluetooth, and a wired network with a fixed IP address. The detection module 200b is configured to detect mass information loaded by at least part of the weights in the weight assembly.
The communication module 201 is configured to send the detection information obtained by the detection module 200b to a control device, and is configured to send result information fed back by the control device to the display module 202, so that the display module 202 displays the result information. Optionally, the communication module 201 and the display module 202 are in signal connection through at least one of WI-FI, bluetooth and a wired network with a fixed IP address. Wherein each control device can be connected with one or more electronic scales.
In practice, the communication module 201 includes, but is not limited to, a module having a communication function, such as a WI-FI module, a bluetooth module, a wired transmission module, and the like. The result information displayed by the display module 202 includes, but is not limited to: at least one of weight information, unit price information, total price information.
In some examples, as shown in fig. 3, the detection module 200b includes a sensor 203, an information processing module 204, wherein:
the sensor 203 is in signal connection with the information processing module 204; in an implementation, the sensor 203 is a load cell. It should be noted that the information processing module 204 in this embodiment does not have the capability of processing the curve corresponding to the a/D signal and the display value, nor stores the curve corresponding to the a/D signal and the display value, and the information processing module 204 in this embodiment is used for performing processing such as amplification, a/D conversion and the like on the weight information collected by the sensor 203, and is intended to process digital signals for calculation by the control device for convenient transmission.
The sensor 203 is configured to detect weight information of at least a part of weights moving to the force bearing surface of the sensor 203 in the weight assembly 200a, and send the weight information to the communication module 201 through the information processing module 204.
In implementation, the weight information detected by the detection module 200b of the electronic scale is sent to the control device through the communication module 201, it should be noted that in this embodiment, the weight information detected by the sensor is actually an a/D signal acquired by the sensor, that is, the a/D signal is sent to the control device, the control device completes the conversion operation on the weight information, sends the result information obtained by the operation to the display module 202, and stores the result information and the acquired a/D signal to the control device.
In some examples, as shown in fig. 4, the detection module 200b further comprises a turning shaft 205 connected with the weight assembly 200a, wherein:
the rotating shaft 205 drives at least part of the weights in the weight assembly 200a to move from the initial position to the force bearing surface of the sensor 203 through the rotation in the first direction, so as to load the weights; or
The rotation shaft 205 drives the weight assembly 200a to move from the force bearing surface of the sensor 203 to the initial position through rotation in a second direction, wherein the first direction and the second direction are opposite directions, so as to unload the weight. For example, the first direction is clockwise and the second direction is counterclockwise; or, the first direction is a counterclockwise direction, and the second direction is a clockwise direction, which is not limited to this embodiment.
Wherein the initial position is different from the force bearing surface of the sensor 203, when at least part of the weights in the weight assembly 200a move from the initial position to the force bearing surface of the sensor 203, at least part of the weights are loaded on the sensor 203, so that the sensor 203 can detect the loaded mass information, for example, when no weight exists on the force bearing surface of the sensor 203, if 100g of weights are moved from the initial position to the force bearing surface of the sensor 203, the sensor 203 can detect that the weight of the loaded weight is 100g, and if 50g of weights are moved from the initial position to the force bearing surface of the sensor 203 again on the basis of 100g of weights existing on the force bearing surface of the sensor 203, the sensor 203 can detect that the weight of the loaded weight is 150 g.
Conversely, when at least part of the weights in the weight assembly 200a move from the force-bearing surface of the sensor 203 to the initial position, at least part of the weights are unloaded from the sensor 203, so that the sensor 203 can detect the unloaded mass information, for example, when there are 100g weights on the force-bearing surface of the sensor 203 and the 100g weight is moved from the force-bearing surface of the sensor 203 to the initial position, the sensor 203 can detect that the unloaded weight is 0g, and if there are 100g weights on the force-bearing surface of the sensor 203 and the 50g weight is moved from the force-bearing surface of the sensor 203 to the initial position, the sensor 203 can detect that the unloaded weight is 50 g.
In some embodiments, as shown in fig. 5, the rotating shaft 205 is in signal connection with the communication module 201, and the communication module 201 is used for indicating the rotating direction of the rotating shaft 205. For example, the communication module 201 receives an indication signal of a control device, and is configured to indicate that the rotating shaft 205 rotates in a first direction, and then the rotating shaft 205 rotates in the first direction to drive at least part of the weights in the weight assembly 200a to move from an initial position to a force bearing surface of the sensor 203, and the sensor 203 detects that the weight mass on the force bearing surface increases, so as to implement an automatic weight loading process, and the sensor performs data processing on the detected mass information through the information processing module 204 and then sends the processed mass information to the communication module 201, where the mass information at this time is the mass information after the weight is automatically loaded. Similarly, the rotating shaft 205 rotates in the second direction to drive the weight assembly 200a to move from the force-bearing surface of the sensor 203 to the initial position, the sensor 203 detects that the mass of the weight on the force-bearing surface is reduced, so as to implement the automatic unloading process of the weight, the sensor processes the detected mass information through the information processing module 204, and sends the processed mass information to the communication module 201, and at this time, the mass information is the mass information of the unloaded weight, and may be zero.
In some embodiments, as shown in fig. 6, the information processing module 204 includes an amplifier 204a, an analog/digital a/D converter 204b, wherein:
the sensor 203 is in signal connection with the communication module 201 through the amplifier 204a and the a/D converter 204b in sequence.
In operation, the pivot shaft 205 is controlled to load at least some of the weights in the weight assembly 200a onto the force-bearing surface of the sensor 203 during internal calibration. The weight of the weight loaded by the calibration module 200 may be an integer or a non-integer. At least part of the weights in the weight assembly 200a are loaded on the force bearing surface of the sensor 203, an analog signal generated by the sensor is converted into a digital signal through the amplifier 204a and the A/D converter 204b, the digital signal can be sent to the PC terminal through the RS-232 interface by the communication module 201, and the PC terminal generates an A/D curve according to the received digital signal and a nominal mass value loaded on the force bearing surface of the sensor 203 during internal calibration, wherein the nominal mass value is used for representing a standard mass value preset during internal calibration. During conventional weighing, an analog signal generated by loading a weighed object on a force bearing surface of the sensor 203 is converted into a digital signal through the amplifier 204a and the A/D converter 204b, the digital signal can be sent to the PC end through the RS-232 interface by the communication module 201, the PC end converts the digital signal into a corresponding quality display value according to the received digital signal and an A/D curve obtained by internal calibration, and then the quality display value is sent to the display module 202 through the communication module 201 to display the weighing to obtain a weight value. The PC end may also import parameters such as unit price of the commodity according to actual needs, and output the total price obtained by calculation to the display module 202.
In the embodiment, the loading process of the weight during internal calibration can be calibrated by simulating a large-mass weight with a small-mass weight by adopting an external assignment mode, specifically, the current signal magnitude of the sensor 203 under a fixed calibration point is acquired in advance through an external standard weight, then the weight in the weight component 200a of the calibration module 200 is loaded on the sensor 203, the current signal value at the moment is acquired, the current signal value is amplified to a current signal corresponding to the loading of the standard weight through the amplifier 204a, the amplification factor at the moment is recorded, when the electronic scale enters a calibration mode, the weight of the calibration module is loaded on the sensor, the generated current value is adjusted to the current signal magnitude loaded on the sensor by the standard weight through the amplifier, and the calibration is completed. For example, an electronic scale should be calibrated with a 20kg weight, and the calibration module 200 is loaded with only 100g, where the 100g weight of the calibration module is pre-assigned before starting the calibration. The method comprises the steps of firstly collecting a current signal X generated after a weight of 20kg is loaded, then collecting a current signal Y when the loading capacity of a calibration module 200 is 100g, determining the amplification factor of the amplifier for coping current, and recording. After entering the calibration mode, the weight of the calibration module 100g is loaded on the sensor, the generated current signal amplifies Y to be equal to X through the amplifier 204a, the load of 100g simulates the load of 20kg, and calibration is completed, so that the calibration of the electronic scale is realized by simulating the load of a large-mass weight by using a small loaded weight.
As shown in fig. 7, the control device in this embodiment is in signal connection with a communication module 201 of the electronic scale in this embodiment. The electronic scale in this embodiment controls timing calibration through a built-in calibration module 200 by using a control device such as a PC terminal, that is, a timing calibration instruction sent by the control device is received through a communication module 201 to instruct the calibration module 200 of the electronic scale, calibration is automatically completed on the electronic scale under the condition that no load of a scale pan is determined, that is, loading and unloading of a weight component 200a in the calibration module 200 are used to acquire a corresponding curve of a new a/D signal and a display value and send the curve to the PC terminal, the PC terminal checks a history stored curve by using the newly acquired curve, and when a difference between the display value calculated by the newly acquired curve and the display value calculated by the history stored curve exceeds a predetermined range, it is described that the electronic scale is abnormal, and then feedback result information including the abnormality is sent to a display module 202 of the electronic scale through the communication module 201.
In some embodiments, the electronic scale further comprises an alarm module, wherein the alarm module is in signal connection with the communication module 201 through at least one of WI-FI, Bluetooth and a wired network with a fixed IP address. The alarm module may be built in or integrated with the display module 202, or may be a single module. The alarm module is used for sending out an alarm signal, and the alarm signal comprises at least one of characters, voice, alarm sound and alarm lamps. When the electronic scale is abnormal, the alarm module can give an alarm according to the received result information so as to prompt a user that the electronic scale is possibly abnormal, wherein the abnormal condition of the sensor or the abnormal function of the calibration module is possible.
Compared with the traditional electronic scale, the electronic scale in the embodiment transplants the processor to the remote PC end, is suitable for the general distribution and management of electronic scales in a closed managed market, a supermarket with a lease booth and the like, and prevents individual personnel from privately changing the curve corresponding to the A/D signal and the display value of the electronic scale to carry out weighing cheating. Meanwhile, a new A/D signal and display value corresponding curve can be obtained at regular time through an internal calibration module and is compared with an original curve to determine whether the metering performance of the electronic scale meets the use requirement or not, so that the real-time monitoring of the metering performance of the electronic scale is realized, and the problems that the metering performance of the traditional electronic scale can only be determined through regular verification, the metering performance cannot be verified between two verification periods, and the accuracy cannot be guaranteed are solved. The electronic scale operation end in the embodiment sends the electronic scale operation end to the PC end for operation in a wireless and local area network mode, and outputs the electronic scale operation end to the display; the data storage and processing capacity of the PC terminal is utilized to realize the comparison of the A/D signal value acquired before and after the electronic scale is corrected and the corresponding curve of the display value, and determine whether the metering performance of the electronic scale is reliable or not.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The utility model provides an electronic scale with calibration function which characterized in that, includes calibration module, communication module and display module, wherein:
the calibration module comprises a weight component and a detection module which is used for being matched with the weight component to detect weight information of the weight;
the detection module is in signal connection with the communication module, and the display module is in signal connection with the communication module;
the communication module is used for sending the detection information obtained by the detection module to the control equipment and sending the result information fed back by the control equipment to the display module so that the display module displays the result information.
2. The electronic scale according to claim 1, wherein the detection module comprises a sensor, an information processing module, wherein:
the sensor is in signal connection with the information processing module;
the sensor is used for detecting weight information of at least part of weights moving to the force bearing surface of the sensor in the weight component and sending the weight information to the communication module through the information processing module.
3. An electronic scale according to claim 2, wherein the sensor is a load cell.
4. The electronic scale of claim 2, wherein the detection module further comprises a pivot shaft connected to the weight assembly, wherein:
the rotating shaft drives at least part of weights in the weight component to move from an initial position to the force bearing surface of the sensor through rotation in a first direction so as to load the weights; or
The rotating shaft drives the weight component to move from the force bearing surface of the sensor to the initial position through rotation in a second direction so as to unload the weight, wherein the first direction and the second direction are opposite directions.
5. The electronic scale according to claim 4, wherein the rotary shaft is in signal connection with the communication module, the communication module being configured to indicate a direction of rotation of the rotary shaft.
6. The electronic scale according to claim 2, wherein the information processing module includes an amplifier, an analog/digital a/D converter, wherein:
the sensor is connected with the communication module through the amplifier and the A/D converter in sequence.
7. The electronic scale of claim 1, wherein the detection module is in signal connection with the communication module and comprises:
the detection module is in signal connection with the communication module through at least one of wireless communication technology WI-FI, Bluetooth and a wired network with a fixed IP address.
8. The electronic scale of claim 1, wherein the communication module is in signal connection with the display module via at least one of WI-FI, bluetooth, and a wired network having a fixed IP address.
9. The electronic scale according to any one of claims 1 to 8, further comprising an alarm module, wherein the alarm module is in signal connection with the communication module through at least one of WI-FI, Bluetooth and a wired network with a fixed IP address.
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| CN202121974433.9U CN215865460U (en) | 2021-08-20 | 2021-08-20 | Electronic scale with calibration function |
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| CN202121974433.9U CN215865460U (en) | 2021-08-20 | 2021-08-20 | Electronic scale with calibration function |
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